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Add parameters to xfs_bmapi() and xfs_bunmapi() to have them
report the range spanned by modifications to the in-core extent
map.  Add XFS_BUNMAPI() and XFS_SWAP_EXTENTS() macros that call
xfs_bunmapi() and xfs_swap_extents() via the ioops vector.
Change all calls that may modify the in-core extent map for the
data fork to go through the ioops vector.  This allows a cache
of extent map data to be kept in sync.
Add protoype for xfs_swap_extents().

/*
 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_DFRAG_H__
#define	__XFS_DFRAG_H__

/*
 * Structure passed to xfs_swapext
 */

typedef struct xfs_swapext
{
	__int64_t	sx_version;	/* version */
	__int64_t	sx_fdtarget;	/* fd of target file */
	__int64_t	sx_fdtmp;	/* fd of tmp file */
	xfs_off_t	sx_offset;	/* offset into file */
	xfs_off_t	sx_length;	/* leng from offset */
	char		sx_pad[16];	/* pad space, unused */
	xfs_bstat_t	sx_stat;	/* stat of target b4 copy */
} xfs_swapext_t;

/*
 * Version flag
 */
#define XFS_SX_VERSION		0

#ifdef __KERNEL__
/*
 * Prototypes for visible xfs_dfrag.c routines.
 */

/*
 * Syscall interface for xfs_swapext
 */
int	xfs_swapext(struct xfs_swapext __user *sx);

int	xfs_swap_extents(struct xfs_inode *ip, struct xfs_inode *tip,
		struct xfs_swapext *sxp);

#endif	/* __KERNEL__ */

#endif	/* __XFS_DFRAG_H__ */